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3 result(s) for StandardDeviation Population
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OPC-10000-13 – OPC Unified Architecture - Part 13: Aggregates5.4.3.37 StandardDeviationSamplecalculation is done on a subset of the full set of data. Use StandardDeviationPopulation to calculate the standard deviation of a full set of data (see 5.4.3.39 ). An example would
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OPC-10000-13 – OPC Unified Architecture - Part 13: Aggregates5.4.3.39 StandardDeviationPopulationStandardDeviationPopulation The StandardDeviationPopulation Aggregate defined in Table 87 uses the formula: where X is each Good raw value in the interval, Avg(X) is the average of the Good ... collected on an exception basis versus sampled from the data source. Table 87 - StandardDeviationPopulation Aggregate summary StandardDeviationPopulation Aggregate Characteristics Type Calculated Data Type Double Use Bounds None Timestamp StartTime StatusCode
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OPC-10000-13 – OPC Unified Architecture - Part 13: Aggregates5.4.3.40 VariancePopulationretrieves the square of the standard deviation. Its behaviour is the same as the StandardDeviationPopulation Aggregate . Unless otherwise indicated, qualities are Good, Calculated . This calculation is for a full population